Under the admin settings is a page for Sub version.
Are there any guides on setting this up and what it does?

Thanks,
Jason

When a url is entered into the SVN url a new tab on the menu will be present that allows users to browse the source repository.

The rest of the settings and options are for administration of SVN repositories within BugNET. After some internal discussion this will be removed from future release and the rest of the settings will be re-branded as
source repository instead of using SVN specific naming.